Figure 8. Lift deficiency versus reduced frequency.

From

Boundary Element Method Applied to the 2D Foil with Oscillating Heave and Pitch Motions

Mehdi Pourmostafa, Hassan Ghassemi, Parviz Ghadimi

American Journal of Mechanical Engineering. 2020, 8(1), 17-25 doi:10.12691/ajme-8-1-3